What can cause variations in amplitude received from the injectors at the transceiver?

The variations in amplitude received from the injectors at the transceiver can indeed be significantly influenced by frequency response issues in the signal path. This relates to how different frequencies are transmitted and received; if the signal path does not have a consistent frequency response, certain frequencies may be attenuated or amplified more than others. This can lead to inconsistent amplitude levels in the received signal because the components in the signal path may not respond uniformly across the frequency spectrum.

For instance, if the components like filters, amplifiers, or cables have varying performance levels at different frequencies, it can lead to distortions in the signal, resulting in amplitude variations. Understanding frequency response is crucial as it ensures that the relevant data frequencies are transmitted accurately, thus maintaining the integrity of the signals received by the transceiver. This consideration is fundamental in maintaining reliable system performance in communication applications.